tests: Pin anvil to version 1.2.3 (#6112) #10117

Job	Run time
Subgraph Runner integration tests	4m 46s
Check rustfmt style	9s
Run unit tests	9m 2s
Run integration tests	9m 21s
Clippy linting	1m 30s
Build in release mode	1m 7s
	25m 55s

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